<template>
  <div class="todo-header">
    <input v-model="title"  @keyup.enter="addT" type="text" placeholder="请输入你的任务名称，按回车键确认"/>
  </div>
</template>

<script>
export default {
  name: "Header",
  data(){
    return{
      title:''
    }
  },
  props:{
    todos:Array,
    addTodo:Function
  },
  methods:{
    addT(){
      //获取输入的值
     const {title}=this
      //不能输入空值
      if (!title.trim()) return alert('请不要输入空值')
      //包装成一个对象
      const todoObj={id:Date.now(),name:title,done:false}
      //通知app添加一个todo
      this.addTodo(todoObj)
      //清空输入框
      this.title=''
    }
  }
}
</script>

<style scoped>
/*header*/
.todo-header input {
  width: 560px;
  height: 28px;
  font-size: 14px;
  border: 1px solid #ccc;
  border-radius: 4px;
  padding: 4px 7px;
}

.todo-header input:focus {
  outline: none;
  border-color: rgba(82, 168, 236, 0.8);
  box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075), 0 0 8px rgba(82, 168, 236, 0.6);
}
</style>